Apache Hadoop 2.X.X installation...

Steps to be done before running setup.sh

Install Open ssh Server

 sudo apt-get install openssh-server

install Oracle Java 7

 sudo add-apt-repository ppa:webupd8team/java
 sudo apt-get update
 sudo apt-get install oracle-java7-installer 

Set JAVA_HOME in .bashrc

Steps for Hadoop Installation

 $ sh setup.sh $USER

 1. Hadoop 2.2.0

 2. Hadoop 2.3.0

 3. Hadoop 2.4.0

 select required option 1 or 2 or 3 : |

Now Check your Word count program result at

$ localhost:50070 (output folder)

Thats it :)